Regardless of what form symptoms take (SKIN RASH, tingling around the MOUTH, DIARRHEA), a type I hypersensitivity reaction is a systemic response-it affects and involves the body as a whole.
How to Read Your Eyeglass Prescription. The first step to understanding your eyeglass prescription is knowing what OD and OS mean. They are abbreviations for oculus dexter and oculus sinister, which are Latin terms for right eye and left eye.
Optometrist (OD): Vision Care and Eye Care Services. Optometrists are medical professionals but not physicians who went to medical school. After college, they spent four years in a professional program and got a doctor of optometry degree. Some optometrists undergo additional clinical training after optometry school.